MrMC works alright, I just have media on a USB drive which is plugged into my router and then I share it with MrMC. The one thing that pains me...scratch that, I have a few issues with ATV4.
- No 24hz support
- The typing interface is horrible, who designed that and why hasn't it been fixed yet
- The remote, looks nice but all too often I pick it up and activate something because I have touched the touchpad, apart from smooth one end and rough the other it's hard to work out which end is which in the dark.
- Netflix app (yeah more of a Netflix issue) at times gets stuck in an infinite loop and the only way to fix it is reinstall it.
I do kind of think they should have made the remote backlit. And though it annoys me in other ways I do think tne changes Apple made to how the trackpad works helps a little.
It is a shame that apps cannot support 24hz though if I'm honest much of the time I don't notice it anymore.
I more notice apples lack of support of modern surround sound formats. Though apps have found work arounds by just outputing the audio as pcm.